The resource in CosmosDB cannot be found

Question

The resource in CosmosDB cannot be found

I have successfully stored documents on Cosmos, but I am encountering an issue when trying to retrieve them using the "read" method.

this.cosmos = new CosmosClient({
  endpoint: ''
  key: ''
});

this.partitionKey = '/id'

this.container = this.cosmos.database('test').container('test');

type Data = {
  value: string;
} & ItemDefinition;

// read operation
const { resource } = await this.container.item(key, this.partitionKey).read<Data>();

console.log('>>>', JSON.stringify(resource));

This code snippet prints >>> undefined

Can someone help me troubleshoot what might be wrong with my approach?

UPDATE: After further investigation, the statusCode returned is 404, even though the object exists in the database. What could be causing this discrepancy?

javascript typescript azure azure-cosmosdb

Answer 1

Answer №1

It is important that the Partition Key represents the value, not the path.

this.partitionKey = '/id'

This refers to the actual value of the key.

For instance, if there is an item with an id of A, and the Partition Key Path is set as /id, then the Partition Key Value will be the value of that property in the item, which in this case is also A.

let key = "A";
let pk = "A";
const { resource } = await this.container.item(key, pk).read<Data>();

If the Partition Key Path is something different, such as /someOtherProperty, and there is an item like this:

{
  "id": "A",
  "someOtherProperty": "B"
}

In order to read it, you would use:

let key = "A";
let pk = "B";
const { resource } = await this.container.item(key, pk).read<Data>();

Answer 2

It is important that the Partition Key represents the value, not the path.

this.partitionKey = '/id'

This refers to the actual value of the key.

For instance, if there is an item with an id of A, and the Partition Key Path is set as /id, then the Partition Key Value will be the value of that property in the item, which in this case is also A.

let key = "A";
let pk = "A";
const { resource } = await this.container.item(key, pk).read<Data>();

If the Partition Key Path is something different, such as /someOtherProperty, and there is an item like this:

{
  "id": "A",
  "someOtherProperty": "B"
}

In order to read it, you would use:

let key = "A";
let pk = "B";
const { resource } = await this.container.item(key, pk).read<Data>();

The resource in CosmosDB cannot be found

Answer №1

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